This will be my first double language post -_-“, this moment and beyond I would like to write here more and more in english, just because I really need improve this skill. So, let’s go.

I was take a look around my favourite sites and one this is all commands lines, a very awesome site that their users can post all kind of command line for shell unix. Then, I saw this set of commands :paste <(seq 7 | shuf | tr 1-7 A-G) <(seq 7 | shuf) | while read i j; do play -qn synth 1 pluck $i synth 1 pluck mix $2; done.

This giant command line make your sound card play some random sounds. But, it was not because that I wanted post this stuff. My goal here is show to you that with a simple fun you can learn many things that in the future can become very useful to you.
Let’s see this. I separeted some commands of this line, like: tr, shuf and seq. The first can translate a character or number, a set in another set. Some like this. tr “1-7” “A-Z” , and 1.2.3.4… become A,B..C… The shuf command exchange you output and lastly seq generate a chain.